Everyone with your exact job title in your industry vanishes, how long until awful things happen?
I'm a support engineer for dental software. So difficult issues won't get immediate resolutions, and instead development will actually have to fix things because offices will be crying at them for a fix instead of at me.
Yeah, software dev disappearance I feel like would result in a slow Jenga game of things becoming more unstable until they all fall down at once. Unless we figure that the world will got completely ballistic at the prospect of multiple millions of people just vanishing, then the knock on effects won't really matter.